Book-sewing machine



3 Sheets- -Sheet 2.

R N EM Tm MG sN m MB 8 H 0 B (No Model.)

Patented Feb. 2, 1892.

(No Model.) a Sheets-Sheet 3. D. M SMYTH.

BOOK SEWING MACHINE.

Patented Feb. 2, 1892.

UNITED STATES PATENT OFFICE.

DAVID MCCONNELL SMYTII, OF NORTI'IIVOOD, NEIV HAMPSHIRE, ASSIGNOR TO DTHE SMYTH MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT.

BOOK-SEWING MACHINE.

SPECIFICATION formingpart of Letters Patent No. 468,118, dated February2, 1892.

Application filed April 22, 1891. Serial No. 389,922. (No model.) 7

To aZZ whom it may concern:

Be it known that 1, DAVID MoOoNNnLL SMYTH, a citizen of the UnitedStates,residing at Northwood, in the county of Rockingham and State ofNew Hampshire, have invented an Improvement in Book-Sewing Machines, ofwhich the following is a specification.

In my present improvements I make use of a needle passing diagonallyinto the back of the signature, and this needle carries athread, andthere is a looper passing vertically into the fold and seizing aloop ofsaid thread and drawing it out of the back, so as to interloop the samewith the previously-sewed loops of the same thread, and I introduce one,two, or more perpendicular eye-pointed needles carrying threads, throughthe loops of which threads the aforesaid diagonalneedle passes, so as toleave the loops of thread around the double threads laid in by thediagonal needle.

One of the special featuresof this present improvement relates to aheavy cord interlaced with the threads supplied by the perpendicularneedles, so that such heavy cord lies transversely of the book-back andoccupies a nearly straight position when placed under tension, and thesetransverse cords may occupy saw-cuts in the back edges of thesignatures, if desired; or such cords may be laced across a strip ofparchment, tape, or similar material for strengthening the booksewing.

In the drawings, Figure l is a general ele vation of the features of thepresent improve, ment. Fig. 2 is a sectional plan view at the line a: wof Fig. 1. Fig. 3 is a diagram illustrating the manner in which therespective parts can be connected to a motor or main shaft. Figs. 4 to 9are diagrams illustrating the different positions of the respectiveneedles and the sewing at the back of the book.

The vertical shaft C is provided with sheetholding arms 6, which may beconstructed and actuated in the manner represented in my patent, No.220,312, granted October 7, 1879, and I make use of diagonal needleswhich may be actuated in any desired manner, and I refer to my PatentNo. 250,990 as showing diagonal needles.

The diagonal needle F is represented as supported by a stock 8, slidingin a holder 9 and actuated by a pinion 10, and this pinion 10 is upon ashaft supported in the cross-bar G, and at the rear end a pinion 11 isrepresented as actuated by a sliding rackbar II, with a lever K and acam upon the drivingshaft E; but I do not limit myself to this manner ofgiving motion at the proper time to the diagonal needle F. Theeye-pointed needles P P are received in the slide M, which is supportedby guides upon the crossbar G, and this slide M receives its verticalmovement at the proper time by any suitable mechanism. I haverepresented a crank 12, the pin of which passes into a slot in the slideM, and the other arm of the crank receives a bar 14, leading to' a lever24, that is actuated by a suitable cam on the driving shaft E.

I make use of the cord-bar Q, or similar device, to which an endwisereciprocating motion is given by any suitable mechanism such, forinstance, as the lever Q, and cam Q which latter revolves oncefor everytwo revolutions of the driving-shaft Eand in this cord-bar Q are holesfor the cords 20 and 22 that are supplied from spools. The thread forthe diagonal needle F is supplied from the spool 21, and for theeye-pointed needles P I from the spools 18 and 19, and the parts areconstructed and timed so that the sewing is performed in the followingmanner, it being understood that the signatures A may have receivedsaw-cuts or perforations at the places where the respective needlesenter, or such needles may perforate the paper. The signatures A areplaced upon the sheet-holding arms in succession and brought around toposition and sewed, and after one sheet has been sewed the sheet-holdingarm descends and passes out of the same, the sewed signature is pushedback, and another signature is brought round and elevated to position,as in my Patent No. 220,312, or in any other manner known inbook-sewing. The needles I and I are driven down through the signatureand carry with them threads from the spools 1S and 19, and they risesuihciently to throw-outloopsofthread. Bythetimethistakes place thediagonal needle F has passed into the signature and then goes throughtheloops of thread, as represented in Fig. 8, and these needles P P andthe looper L are raised sufficiently for the looper L to be above theloop of thread from the spool 21, which is thrown out by a partialwithdrawal of the diagonal needle F. The slide M is again depressed, sothat the looper L passes through the loop of thread from the needle F,as shown in Fig. 9. The slide M is then elevated, drawing up theneedlesP P and looper L to the position shown in Fig. 6, and the threadsare drawn up by a tension or take-up device applied to the respectivethreads to draw up the slack thread, so that the loop of thread from theneedle F lies double along in the signature with the end of the looparound the looper L, and the threads from the spools 18 and 19 andneedles P P are in the form of loops around the threads from the needleF, and these loops that pass around the longitudinal threads may bewrapped around the same if the needles P P are between the diagonalneedle F and the mass of signatures that have been sewed; but if thediagonal needle F passes behind the needles P P and between the same andthe mass of signatures that have been sewed, as represented in Figs. 8'

and 9, the loops of thread from the needles P P that pass around thelongitudinal threads will be U-shaped.

\Vhen the needles assume the positions shown in Fig. 6, a freshsignature is to be supplied and the needles are caused to penetrate thesame and the sewing is proceeded with, as before described, and asillustrated in Figs. 7, 8, and 9.

The looper L in all instances seizesa loop of thread from the diagonalneedle F and draws such loop out at the back of the signature andthrough the similar loop from the previously-sewed signature, so thatthere is a line of loops, as represented at 5, and I remark that thislooper L may be actuated 'in any suitable manner to throw off theprevious loop as the fresh loop is drawn through such previous loop, ascommon in sewing-machines.

I have represented the looper L as at the lower end of the looper-rod15, and this rod 7 15 slides in a standard N, which is slotted for viousloop as such previous loop slips off the end of the looper and aroundthe fresh loop of thread.

The devices thus far described, and illustrated by the diagrams Figs. 6,7, 8, and 9, may alone be made use of in sewing books; but it isadvantageous to make use of the cords or heavy threads 20 22 from thespools 26 and 27 to strengthen the sewing, these cords passing througheyes in the cord-bar Q, and this cord-bar Q is moved endwise between onesewing operation and the next. Hence each cord 20 22 is interlaced andconfined by the threads from the needles P P,

as indicated in Fig. 4, because the cords are to be moved by the bar Qat the timethe needles P P are entirely elevated, IIence such needles PP will pass into the signatures first at one side and then at the otherside of such cords 2O 22 and the sewing will be performed as illustratedin Fig. 4, and where the back edges of the signatures have beenchanneled or saw-cut such cords 20 22 will lie in such saw-cuts, and thetension applied to such cords 2O 22 should be sufficient to cause thecords to draw nearly straight and thereby the strain of the binding willbe thrown upon such cords. V 3 7V lf only one cord 20 is made use of andthe cord-bar Q receives a sufficient length of movement, the cord 20will be laced around the thread from the needleP and then around thethread from the needle P, as illustrated in the diagram, Fig. 5, and inthis case such cord 20 may confine to the back of the book a strip ofparchment or a tape, as illustrated by the dotted lines 17.

It is to be understood that the sewing devices described form a group,and that in large books there may be two or more groups of sewingdevices arranged and actuated as herein described, and, if desired, thediagonal needles F may be placed in an opposite direction in one groupfrom what they are in the other group, and there may be three eyepointedneedles or more instead of two eyepointed needles P P, and in caseswhere only one eye-pointed needle is made use of the cord-bar and cordfrom the same can be interlaced, as before set forth.

I claim as my invention' 1. In a book-sewing machine, the combination,with the diagonally-reciprocating eyepointed needle F, of a looper forinterlooping the thread of such diagonal needle, avertically-reciprocating eye-pointed needle pass ing into the signatureand carrying a thread, through a loop of which the double threads fromthe diagonal needle pass, and means for interlacing a cord with thethread from the vertically-reciprocating eye-pointed needle across theback of the book, substantially as set forth- 2. The combination, in abook-sewing machine, of a diagonally-reciprocating eye-point- IIO edneedle carrying a thread anda verticallyreciprocating eye-pointed needlecarrying a thread that is laid around the double thread from thediagonally-reciprocating needle, and the looper interlooping the threadfrom such diagonally-reciprocating needle, and mech-.

anism for placing a cord or thread first at one side and then at theotherside of the path pointed needle, and means for giving to therocating bar having an eye for a cord, and looper a partial rotation tothrow oh": the premechanism for moving the same so as to invious loop,substantially as set forth. terlaee the cord or heavy thread with the 4.The combination, in a hook-sewing mathread of thevertically-reoiproeating eye- I 5 5 ohine, of a sheet-holding arm, adiagonallypointed needle, substantially as set forth.

reciprocating eye-pointed needle, a looper Signed by me this 15th day ofApril, 1891.

and a vertieally-reciprocating eye-pointed E T T needle, a slide forcarrying the same, and ID MCOOLBELL SMYrlH' mechanism for moving suchslide and cans- \Vitnesses:

IO ing the vertieally-reciprocating needle and JOs. E. SMYTH,

looper to penetrate the signature, a reeip- C. A. BRIOKETT.

